Learning about Pro Seal stuff. First thing I learned was that whatever you are doing, it takes several times as long in sticky gloves! Picking up those little rivets and getting them in the holes is a tough job. I did not waste much of the stuff yet though, I just mix up a small lbatch, since it starts setting up after a short while, maybe 45 minutes or less? I still have to do the firewall bottom and sides and the firewall rivets as well yet too. I hope it seals good, it appears to me that others have a thinner version, which I would feel better with since it would "run" into the cracks and joints.